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Hi, I just recently overcame a TPS fault.I had a 2-2-3 and a 4-1-1 code as you stated.The 2-2-3 code is related to (TPS throttle sensor signal too low) and the 4-1-1 code is related to ( Throttle position sensor (TPS) signal from fuel injection system missing or faulty. So both faults suggested that my TPS is dodgey.I investigated and found that this link help me locate the TPS.
http://www.volvospeed.com/Repair/ftrap.php .I could not find any info on repairing the TPS.I sprayed my male and female contacts on the TPS with contact cleaner and the fault ceased.I also purchased a seconhand unit and replaced the TPS; this also removed the fault.I would suggest to change it out.They are pretty costly bits of plastic a new one cost me $200.00 AU.
I also have a previous post under Throttle Position Sensor on this page , check it out if you already haven't.
Let me know how you went.
Regards,
Si850
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